US4829647A - Method of making low friction finger follower rocker arms - Google Patents
Method of making low friction finger follower rocker arms Download PDFInfo
- Publication number
- US4829647A US4829647A US07/132,740 US13274087A US4829647A US 4829647 A US4829647 A US 4829647A US 13274087 A US13274087 A US 13274087A US 4829647 A US4829647 A US 4829647A
- Authority
- US
- United States
- Prior art keywords
- sheet stock
- stock section
- strip sheet
- openings
- channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49295—Push rod or rocker arm making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/4984—Retaining clearance for motion between assembled parts
- Y10T29/49845—Retaining clearance for motion between assembled parts by deforming interlock
- Y10T29/49853—Retaining clearance for motion between assembled parts by deforming interlock of sphere, i.e., ball, in socket
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49925—Inward deformation of aperture or hollow body wall
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20582—Levers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20882—Rocker arms
Definitions
- This invention relates to the art of making stamped metal articles and, particularly, to the art of making stamped metal articles for use as rockers arms in internal combustion engines.
- the invention is a method of making, and the resulting construction, for a low friction finger follower rocker arm.
- the starting material for the method is a flat strip stock section having a generally rectangular configuration with a centralized opening, to be bent later into a channel for such rocker arm. The shaping and hardening of the stock section is carried out prior to such bending.
- the method steps comprise the following: (a) while substantially in the flat condition (i) shaping the strip sheet stock section to have at least a pair of journal openings aligned on opposite sides of said centralized opening, a pivot surface at one end of the strip sheet stock section, a stud contacting surface at the other end of the strip sheet stock section, such surfaces being aligned with the centralized opening along a line transverse to the alignment of said journal openings, and a pair of grooves aligned with the extremities of the centralized opening and containing the surfaces therebetween, (ii) locally hardening the surfaces and the edges of the opposed openings; (b) bending the shaped strip sheet stock section along the grooves to form a partial channel having side walls with an included angle of no greater than 40° and with said journal openings approaching alignment on a common axis; and (c) inserting a journalized low friction wear assembly with its journals in said opposed journal openings, and then completing the bending of said strip sheet stock section so that the sides of the channel are substantially parallel and locking the wear
- strip stock section used as a starting material is comprised of medium carbon steel stock which has been annealed and cold-rolled, and has a thickness in the range of 0.100-0.250 inches.
- step (a)(i) are carried out by piercing to define the journal openings with indented edges, coining to define the pivot surface and stud contacting surface, and embossing to define the parallel aligned grooves.
- the local hardening of step (a) (ii) is carried out by laser hardening.
- the low friction assembly is comprised of a needle roller bearing assembly having a pin shaft, the shaft being journalled in the opposed openings.
- the time period required for carrying out the steps (a) through (c) should be less than about 10 minutes, resulting in cost savings.
- FIG. 1 is a perspective view of a finger follower rocker arm made by the process of this invention
- FIG. 2 is a plan view of a strip sheet stock section stamped to provide the starting material for the process of this invention
- FIG. 3 is a plan view of the strip sheet stock section of FIG. 2 which has been subjected to the first shaping operation which includes piercing of openings and the indentation of the edges of certain of said openings;
- FIG. 4 is an elevational view of the strip sheet stock section which has been shaped by the second of the shaping operations, including coining of the shallow concave pivot surface and the stud contacting surface;
- FIG. 5 is a sectional view taken along line 5--5 of FIG. 4;
- FIG. 6 is an end elevational view of the strip sheet stock section after having been subjected to a partial bending operation
- FIG. 7 is a plan view of the completed rocker arm assembly shown in FIG. 1;
- FIG. 8 is a sectional view taken along line 8--8 of FIG. 7;
- FIG. 9 is an end elevational view of the structure in FIG. 8;
- FIG. 10 is another elevational view of the structure in FIG. 8.
- FIGS. 11 through 13 are respectively sectional views taken along lines 11--11, 12--12 and 13--13 of FIG. 8.
- the method herein provides for rapid fabrication of stamped roller finger follower arms, which is defined herein to mean low friction roller follower assembly with a sheet metal housing.
- the starting material for the process of this invention comprises a strip sheet metal stock which advantageously will have a size configuration of about 1/8 inch thickness, a 3-inch longitudinal length, and a width of about 2.0 inches. The thickness may be ground to a precise dimension of 0.120 inches.
- the material for the strip sheet stock is a medium carbon steel, SAE 40140-H strip sheet stock, which is annealed and cold-rolled.
- the medium carbon steel is required to facilitate the subsequent local hardening by laser of certain surfaces of the strip sheet stock section.
- Medium carbon steels have a carbon content in the range of 0.30-0.50% by weight.
- the strip sheet stock is given a configuration 11 by stamping, as shown in FIG. 2, containing a centralized elongated opening 12.
- the stamped strip sheet stock section 11 is subjected to shaping which includes piercing, embossing, coining, and trimming as required.
- shaping which includes piercing, embossing, coining, and trimming as required.
- Such operations may be carried out in a transfer press where, at a first station, a pair of journal openings 13 and 14 are defined on opposite sides of the centralized opening 12, that is, transverse to the longitudinal extent 15 of the strip sheet stock section.
- a small oil opening 16 is pierced in one end of the strip sheet stock section and is aligned with a plane 17 bisecting the section with the openings 13 and 14 on opposite sides.
- a pair of grooves 18 and 19 are embossed in a manner so that these grooves are parallelly aligned along the outer edges of the centralized opening 12 and extend generally parallel to the longitudinal centerline 17 of the strip sheet stock section.
- the grooves preferably have an embossed radius in the range of 0.010-0.050 inches; they facilitate subsequent bending of the substantially flat strip sheet stock section into a subsequent channel shape.
- the substantially flat strip sheet stock section is subjected to a blanking operation to define a stud contacting surface 22 at the opposite longitudinal end of the strip sheet stock section while simultaneously coining such stud contacting surface.
- the substantially flat strip sheet stock section may be trimmed to remove offal or edge burns.
- Local hardening is advantageously carried out by the use of lasers in a manner as taught in U.S. Pat. No. 4,533,400 to a hardness level of about Rockwell C55.
- the local hardening is carried out along the indented shoulders 21 of the opposed journal openings 13 and 14 as well as along the entire shallow concave pivot surface 20 and the coined stud contacting surface 22.
- Laser hardening has certain advantages which include: little thermal distortion during heat treatment, minimal energy requirements for heat treating localized areas, and allows process to better meet just-in-time inventory controls.
- the bending operation is carried out in two parts, the first of which is to partially bend the strip sheet stock section along the embossed grooves 18 and 19 to form a partially bent channel 30, as shown in FIG. 6, the channel having side walls 31 and 32 and an included angle 33 of no greater than 40°. Angle 33 is the angle between the side walls of the channel.
- a journalized wear assembly 34 (roller bearing assembly) is inserted with its journal (pin shaft 35) extending into the opposed journal openings 13 and 14 which approach alignment on a common axis 36.
- the wear assembly 34 may use needle bearings 37 arranged concentrically about the pin shaft 35, for supporting a roller 39 for increasing the low friction characteristic of the assembly.
- the time sequence for carrying out the stamping, shaping, hardening and bending operations have been measured to be in the time frame of 4-10 minutes. This is considerably faster than comparative methods of making such stamped metal rocker arms which typically have a time period of several hours. With such rapid sequence of making, the concepts of "just in time” inventory control can be employed for the first time with this particular article.
- a low friction finger-follower rocker arm that comprises: (a) a metal channel formed from flat stock, the channel having a web 42 and side walls 31,32 depending therefrom to define a U-shaped cross-section, the side walls having surfaces defining transversely aligned openings 13,14, and said web having integral wear surfaces 20,22 at opposite ends thereof, the wear and opening surfaces being defined in the flat stock prior to the formation of the channel; and (b) low friction roller assembly 34 journalled in the opening surfaces.
- the wear surfaces are defined by coining and laser hardening, and the flat stock is advantageously comprised of annealed and cold-rolled medium carbon steel.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/132,740 US4829647A (en) | 1987-12-14 | 1987-12-14 | Method of making low friction finger follower rocker arms |
US07/220,714 US4872429A (en) | 1987-12-14 | 1988-07-18 | Method of making low friction finger follower rocker arms |
CA000580173A CA1315622C (en) | 1987-12-14 | 1988-10-14 | Method of making low friction finger follower rocker arms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/132,740 US4829647A (en) | 1987-12-14 | 1987-12-14 | Method of making low friction finger follower rocker arms |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/220,714 Division US4872429A (en) | 1987-12-14 | 1988-07-18 | Method of making low friction finger follower rocker arms |
Publications (1)
Publication Number | Publication Date |
---|---|
US4829647A true US4829647A (en) | 1989-05-16 |
Family
ID=22455386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/132,740 Expired - Lifetime US4829647A (en) | 1987-12-14 | 1987-12-14 | Method of making low friction finger follower rocker arms |
Country Status (2)
Country | Link |
---|---|
US (1) | US4829647A (en) |
CA (1) | CA1315622C (en) |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4979475A (en) * | 1990-05-25 | 1990-12-25 | Henley Manufacturing Holding Company, Inc. | Rocker arm with rounded channel to engage a valve stem with semi-spherical end |
US4995281A (en) * | 1989-07-31 | 1991-02-26 | Ford Motor Company | Lightweight rocker arm |
US5016582A (en) * | 1990-10-12 | 1991-05-21 | Henley Manufacturing Holding Company, Inc. | Rocker arm |
US5048475A (en) * | 1991-01-17 | 1991-09-17 | Henley Manufacturing Holding Company, Inc. | Rocker arm |
US5123384A (en) * | 1991-10-21 | 1992-06-23 | Henley Manufacturing Holding Company, Inc. | Pedestal-mounted rocker arm with bushing |
US5372097A (en) * | 1992-12-18 | 1994-12-13 | Welles Manufacturing | Self-lubricating cam follower |
US5535641A (en) * | 1993-11-29 | 1996-07-16 | Koyo Seiko Co., Ltd. | Rocker arm formed by pressing |
US5575064A (en) * | 1994-12-06 | 1996-11-19 | Honda Giken Kogyo Kabushiki Kaisha | Process for producing rocker arm for internal combustion engine |
WO1998005850A1 (en) * | 1996-08-05 | 1998-02-12 | Motorenfabrik Hatz Gmbh & Co. Kg | Rocker arm for an internal combustion engine |
US5774984A (en) * | 1993-07-07 | 1998-07-07 | Koyo | Method of manufacturing a rocker arm |
US5819694A (en) * | 1997-05-15 | 1998-10-13 | Welles Manufacturing Company | Stamped roller-type cam followers with added height |
US5946800A (en) * | 1996-07-31 | 1999-09-07 | Nippon Piston Ring Co., Ltd. | Method for producing rocker arms |
US6189414B1 (en) * | 1995-12-19 | 2001-02-20 | Yoshizawa Industry Inc. | Counter plate and cutting die for die cutting machine |
US6199527B1 (en) * | 1998-03-12 | 2001-03-13 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6293168B1 (en) | 1999-10-06 | 2001-09-25 | The Torrington Company | Stamped rocker arms for machines such as internal combustion engines |
EP1057980A3 (en) * | 1999-05-31 | 2001-09-26 | Koyo Seiko Co., Ltd. | Rocker arm and method of fabricating rocker arm body |
US6523514B1 (en) * | 1999-08-18 | 2003-02-25 | Koyo Seiko Co., Ltd. | Rocker arm and method of manufacturing rocker arm body |
US20050028774A1 (en) * | 2003-08-06 | 2005-02-10 | The Torrington Company | Finger follower |
EP1609960A1 (en) * | 2004-06-12 | 2005-12-28 | INA-Schaeffler KG | Lever type cam follower |
US20090126665A1 (en) * | 2007-11-21 | 2009-05-21 | James R Edgar | Engine Rocker Arm |
WO2015179747A1 (en) * | 2014-05-23 | 2015-11-26 | Johnson Controls Technology Company | In-process laser hardening/forming of vehicle seat structures and components |
US20170284232A1 (en) * | 2016-03-29 | 2017-10-05 | Otics Corporation | Rocker arm and method of manufacturing the same |
DE102017128931B3 (en) | 2017-12-04 | 2019-05-29 | Schaeffler Technologies AG & Co. KG | Rocker arm for a valve train of an internal combustion engine and method for chipless production of a lever body made of sheet steel |
EP4194667A1 (en) * | 2021-12-07 | 2023-06-14 | AVL Hungary Kft. | Internal combustion engines with variable valve actuation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4430783A (en) * | 1980-03-27 | 1984-02-14 | Toledo Stamping & Manufacturing Company | Method of making a rocker arm |
US4674453A (en) * | 1986-01-21 | 1987-06-23 | Dove Jr James E | Rocker arm and method of forming the same |
US4697473A (en) * | 1986-08-07 | 1987-10-06 | The Henley Group, Inc. | Rocker arm with cam-contacting roller |
-
1987
- 1987-12-14 US US07/132,740 patent/US4829647A/en not_active Expired - Lifetime
-
1988
- 1988-10-14 CA CA000580173A patent/CA1315622C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4430783A (en) * | 1980-03-27 | 1984-02-14 | Toledo Stamping & Manufacturing Company | Method of making a rocker arm |
US4674453A (en) * | 1986-01-21 | 1987-06-23 | Dove Jr James E | Rocker arm and method of forming the same |
US4697473A (en) * | 1986-08-07 | 1987-10-06 | The Henley Group, Inc. | Rocker arm with cam-contacting roller |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4995281A (en) * | 1989-07-31 | 1991-02-26 | Ford Motor Company | Lightweight rocker arm |
US4979475A (en) * | 1990-05-25 | 1990-12-25 | Henley Manufacturing Holding Company, Inc. | Rocker arm with rounded channel to engage a valve stem with semi-spherical end |
US5016582A (en) * | 1990-10-12 | 1991-05-21 | Henley Manufacturing Holding Company, Inc. | Rocker arm |
US5048475A (en) * | 1991-01-17 | 1991-09-17 | Henley Manufacturing Holding Company, Inc. | Rocker arm |
US5123384A (en) * | 1991-10-21 | 1992-06-23 | Henley Manufacturing Holding Company, Inc. | Pedestal-mounted rocker arm with bushing |
US5372097A (en) * | 1992-12-18 | 1994-12-13 | Welles Manufacturing | Self-lubricating cam follower |
US5774984A (en) * | 1993-07-07 | 1998-07-07 | Koyo | Method of manufacturing a rocker arm |
US5535641A (en) * | 1993-11-29 | 1996-07-16 | Koyo Seiko Co., Ltd. | Rocker arm formed by pressing |
US5575064A (en) * | 1994-12-06 | 1996-11-19 | Honda Giken Kogyo Kabushiki Kaisha | Process for producing rocker arm for internal combustion engine |
US6189414B1 (en) * | 1995-12-19 | 2001-02-20 | Yoshizawa Industry Inc. | Counter plate and cutting die for die cutting machine |
US5946800A (en) * | 1996-07-31 | 1999-09-07 | Nippon Piston Ring Co., Ltd. | Method for producing rocker arms |
US6003482A (en) * | 1996-08-05 | 1999-12-21 | Motorenfabrik Hatz Gmbh & Co. Kg | Rocker arm for an internal combustion engine |
WO1998005850A1 (en) * | 1996-08-05 | 1998-02-12 | Motorenfabrik Hatz Gmbh & Co. Kg | Rocker arm for an internal combustion engine |
US5819694A (en) * | 1997-05-15 | 1998-10-13 | Welles Manufacturing Company | Stamped roller-type cam followers with added height |
US20040216711A1 (en) * | 1998-03-12 | 2004-11-04 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6199527B1 (en) * | 1998-03-12 | 2001-03-13 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6959676B2 (en) | 1998-03-12 | 2005-11-01 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6334416B2 (en) * | 1998-03-12 | 2002-01-01 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6508215B2 (en) * | 1998-03-12 | 2003-01-21 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6588101B2 (en) * | 1998-03-12 | 2003-07-08 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6601555B2 (en) * | 1998-03-12 | 2003-08-05 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
US6672266B2 (en) * | 1998-03-12 | 2004-01-06 | Nsk Ltd. | Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof |
EP1057980A3 (en) * | 1999-05-31 | 2001-09-26 | Koyo Seiko Co., Ltd. | Rocker arm and method of fabricating rocker arm body |
US6425361B1 (en) | 1999-05-31 | 2002-07-30 | Koyo Seiko Co., Ltd. | Rocker arm and method of fabricating rocker arm body |
US6523514B1 (en) * | 1999-08-18 | 2003-02-25 | Koyo Seiko Co., Ltd. | Rocker arm and method of manufacturing rocker arm body |
US6293168B1 (en) | 1999-10-06 | 2001-09-25 | The Torrington Company | Stamped rocker arms for machines such as internal combustion engines |
US20050028774A1 (en) * | 2003-08-06 | 2005-02-10 | The Torrington Company | Finger follower |
WO2005014982A1 (en) * | 2003-08-06 | 2005-02-17 | Timken Us Corporation | Roller finger follower |
EP1609960A1 (en) * | 2004-06-12 | 2005-12-28 | INA-Schaeffler KG | Lever type cam follower |
JP2006046325A (en) * | 2004-06-12 | 2006-02-16 | Ina-Schaeffler Kg | Lever-type cam follower |
US7836860B2 (en) | 2007-11-21 | 2010-11-23 | Charter Manufacturing Co., Inc. | Engine rocker arm |
US20090126665A1 (en) * | 2007-11-21 | 2009-05-21 | James R Edgar | Engine Rocker Arm |
WO2015179747A1 (en) * | 2014-05-23 | 2015-11-26 | Johnson Controls Technology Company | In-process laser hardening/forming of vehicle seat structures and components |
CN106163688A (en) * | 2014-05-23 | 2016-11-23 | 约翰逊控制技术公司 | The method inner laser hardening of car seat structure and parts/formed |
US20170284232A1 (en) * | 2016-03-29 | 2017-10-05 | Otics Corporation | Rocker arm and method of manufacturing the same |
US11143060B2 (en) * | 2016-03-29 | 2021-10-12 | Otics Corporation | Rocker arm and method of manufacturing the same |
DE102017128931B3 (en) | 2017-12-04 | 2019-05-29 | Schaeffler Technologies AG & Co. KG | Rocker arm for a valve train of an internal combustion engine and method for chipless production of a lever body made of sheet steel |
WO2019110031A1 (en) | 2017-12-04 | 2019-06-13 | Schaeffler Technologies AG & Co. KG | Rocker arm for a valve train of an internal combustion engine, and method for the non-cutting production of an arm from steel sheet |
US11225884B2 (en) | 2017-12-04 | 2022-01-18 | Schaeffler Technologies AG & Co. KG | Rocker arm for a valve train of an internal combustion engine, and method for the non-cutting production of an arm from steel sheet |
EP4194667A1 (en) * | 2021-12-07 | 2023-06-14 | AVL Hungary Kft. | Internal combustion engines with variable valve actuation |
Also Published As
Publication number | Publication date |
---|---|
CA1315622C (en) | 1993-04-06 |
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Legal Events
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